利用共沉淀法制备了Yb和Mn离子共掺的LaMgAl11O19荧光粉。研究其室温下的发光性能。紫外光激发时观察到发光中心位于504nm的单一宽带发光峰,归因于Yb^2＋的激发态4f135d能级与基态4f14能级间的电子跃迁。同时观察到Yb和Mn共掺的LaMgAl11O19中存在Yb^2＋对Mn^2＋的传能现象,传能过程可能是Yb2＋离子的4f135d能级和4f14能级与Mn2＋离子的4T1能级和6A1能级之间发生能量传递。这种荧光粉可望应用于白光LED。
LaMgAl11O19 phosphors codoped with Yb and Mn ions were prepared by a co-precipitation method.The luminescent properties of the LaMgAl11O19： Yb,Mn phosphors were investigated at room temperature.A broad emission band centered at 504nm was observed due to the electronic transitions from the excited state 4f135d to the ground state 4f14 of Yb2＋.At the same time,an energy transfer from the Yb^2＋ to Mn^2＋ ions was also observed in LaMgAl11O19： Yb,Mn.The energy transfer process may involve the 4f135d and 4f14 levels of Yb^2＋ and the 4T1 and 6A1 levels of the Mn^2＋.It is suggested that this phosphor could be applied in light emitting diodes（LEDs）.
参考文献
| [1] | H.P.You;Y.H.Song;G.Jia;G.Y.Hong .Energytransfer from Tb3+to Mn2+in LaMgAl11O19:Tb,Mn phosphors[J].Optical Materials,2008,31:342-345 |
| [2] | J.J.Zhou;Y.X.Zhuang;S.Ye et al.Broadbanddownconversion based infrared quantum cutting by cooperativeenergy transfer from Eu2+toYb3+in glasses[J].Applied Physics Letters,2009,95:141101. |
| [3] | R. Martin-Rodriguez;R. Valiente;M. Bettinelli .Room-temperature green upconversion luminescence in LaMgAl_(11)O_(19):Mn~(2+), Yb~(3+) upon infrared excitation[J].Applied physics letters,2009(9):091913-1-091913-3. |
| [4] | Bachmann V;Justel T;Meijerink A;Ronda C;Schmidt PJ .Luminescence properties of SrSi2O2N2 doped with divalent rare earth ions[J].Journal of Luminescence: An Interdisciplinary Journal of Research on Excited State Processes in Condensed Matter,2006(2):441-449. |
| [5] | R.J.Xie;N.Hirosaki;M.Mitomo et al.Strong greenemission fromα-Si AlON activated by divalent ytterbium underblue light irradiation[J].The Journal of Physical Chemistry(B)Materials Surfaces Interfaces & Physical,2005,109:9490-9494. |
| [6] | S.C.Abrahams;P.Marsh;C.D.Brandle .Laser andphosphor host La1-xMgAl11+xO19(x=0.050):Crystal structureat 295 K[J].Journal of Chemical Physics,1987,86:4221. |
| [7] | Y.Tanabe;S.Sugano .On the Absorption Spectra of ComplexIons.I[J].Journal of the Physical Society of Japan,1954,9:753. |
| [8] | R.J.Xie;M.Mitomo;K.Uheda;F.Xu,Y.Aki mune .Preparation andluminescence spectra of calcium-and rare-earth(R=Eu,Tb,and Pr)-codoped alpha-Si AlON ceramics[J].Journal of the American Ceramic Society,2002,85:1229. |
| [9] | B. S. B. Karunaratne;R. J. Lumby;M. H. Lewis .Rare-earth-doped alpha'-Sialon ceramics with novel optical properties[J].Journal of Materials Research,1996(11):2790-2794. |
| [10] | O.J.Rubio .Doubly-valent rare-earth ions in halide crystals[J].Journal of Physics and Chemistry of Solids,1991,52:101. |
| [11] | G.Blasse;B.Grabmaier.Luminescent Materials[M].Springer-verlag,1994 |
| [12] | C.Duan;P.A.Tanner .Si mulation of 4f-5d transitions ofYb2+in potassiumand sodium halides[J].Journal of Physics:Condensed Matter,2008,20:215228. |
| [13] | H.You;J.Zhang;G.Hong .Luminescent properties of Mn2+in hexagonal aluminates under ultraviolet and vacuumultravioletexcitation[J].The Journal of Physical Chemistry C,2007,111:10657. |
| [14] | Wei-Ren Liu;Yi-Chen Chiu;Yao-Tsung Yeh .Luminescence and Energy Transfer Mechanism in Ca_(10)K(PO_4)_7:Eu~(2+), Mn~(2+) Phosphor[J].Journal of the Electrochemical Society,2009(7):165-169. |
| [15] | D.L.Dexter .Atheory of sensitized luminescence in solids[J].Journal of Chemical Physics,1953,21:836. |
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